They've remodelled the H4 (and very nice it looks too) supposedly ironing out a few design flaws along the way, but much of your money covers a lot of pointless extras (such 4 track multi-tracking), so for basic recording go for the H2 which gives equal results for half the price. For more on this see the Field Recording Equipment thread.

I would say an H2 is an essentially piece of kit for the Feral Folky out and about along the bee-buzzing byways of North Norfolk (along The Peddlar's Way perhaps?) & chancing upon an ancient church and giving voice to (say) Child #1 in the natural acoustics thereof whilst pondering the nature of the carvings therein.

To the Feral Folkie the whole world is a musical instrument; we sing with the resonances of the ambient universe; we sing in the fucking fields (and vice versa) along the Vagabondian trackways, we commune with the world through song; the world-song, as Crow Sister says.